Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 1 21.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-9) LANDSAT-9 Lat/Lon    Distance(km)  Time Diff(sec)
 01/22/2023   14:28:26   (  70.83, -41.83) 01/22/2023   14:29:34  (  70.76, -39.95)   68.88                68
 01/22/2023   15:18:56   ( -70.11, 126.63) 01/22/2023   15:19:14  ( -70.10, 126.70)    3.03                18
 01/22/2023   16:09:40   (  69.99, -65.88) 01/22/2023   16:08:41  (  69.99, -65.80)    3.01                59
 01/25/2023   06:45:06   (  70.12,  75.06) 01/25/2023   06:46:09  (  70.15,  75.05)    3.53                63
 01/25/2023   07:35:48   ( -70.03,-117.48) 01/25/2023   07:35:39  ( -70.04,-117.47)    1.04                 9
 01/25/2023   08:26:24   (  69.49,  50.62) 01/25/2023   08:25:13  (  69.54,  49.48)   44.60                71
 01/27/2023   23:01:58   (  70.11,-169.15) 01/27/2023   23:02:32  (  70.11,-169.11)    1.78                34
 01/27/2023   23:52:39   ( -69.97,  -1.62) 01/27/2023   23:52:02  ( -70.00,  -1.63)    3.14                37
 01/30/2023   14:28:13   ( -70.54, 138.64) 01/30/2023   14:29:24  ( -70.41, 139.58)   37.94                71
 01/30/2023   15:18:50   (  70.07, -53.31) 01/30/2023   15:18:55  (  70.07, -53.26)    2.05                 5
 01/30/2023   16:09:32   ( -69.97, 114.15) 01/30/2023   16:08:25  ( -69.96, 114.22)    2.83                67
 02/02/2023   06:44:58   ( -70.13,-104.95) 02/02/2023   06:45:51  ( -70.11,-104.94)    2.57                53
 02/02/2023   07:35:41   (  69.98,  62.60) 02/02/2023   07:35:18  (  69.99,  62.54)    2.93                23